What is the OSPF Routing Protocol? Open shortest path first is an Open Standard Link State routing protocol which works by using the Dijkstra algorithm to initially construct the shortest paths and follows that by populating the routing table with resulting best paths. What are the steps required to change neighborship into adjacency? 1. Two-way communication (using Hello Protocol). 2. Database Synchronization which means exchange of Database Description (DD) packets, Link State Request (LSR) packets, Link State Update (LSU) packets. After Database synchronization is complete, the two routers are considered adjacent. Explain LSA (Link-State Advertisement), LSU (Link State Update) and LSR (Link State Request)? The LSAs (Link-State Advertisements) are used by OSPF routers to exchange routing and topology information. When two neighbors decide to exchange routes, they send each other a list of all LSAs in their respective topology database. Each router then checks its topolog
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